Optical repeating system and optical amplifying repeater control method

摘要

An optical repeating system includes an optical transmitter and a plurality of optical amplifying repeaters. The optical transmitter specifies one of the optical amplifying repeaters, and transmits a supervisory command and a control command to the specified optical amplifying repeater as a first sub-signal. The supervisory command is a command to supervise internal circuits of the optical amplifying repeater, and the control command is a command to control amplification factors of optical amplifiers of the optical amplifying repeater. Receiving the supervisory command via the uplink or downlink optical transmission line, the optical amplifying repeater transmit a supervisory signal indicating a supervisory result corresponding to the supervisory command to optical receivers via the uplink and downlink optical transmission lines as a second sub-signal. Receiving the control command via the uplink or downlink optical transmission line, the optical amplifying repeater controls the amplification factors of the optical amplifiers in response to the control command. The optical system can solve a problem of a conventional system in that it is difficult to stabilize amplification characteristics of the optical amplifying repeaters by adjusting the amplification factors of the optical amplifiers the optical amplifying repeaters, although the conventional optical system can supervise the individual optical amplifying repeaters.